myosin

/ˈmaɪ.oʊsɪn/

//ˈmaɪ.oʊsɪn// noun

"myosin" is a 6-letter English headword indexed on PlainSpell.

The verdict

“myosin” is an uncommon English word, ranked #61,656 in English word frequency and used as a noun.

#61,656
frequency rank, English
6
letters

According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Any of a large family of motor proteins found in eukaryotic tissues, allowing mobility in muscles.

Key facts for myosin
PropertyValue
Headwordmyosin
LanguageEnglish
Part of speechNoun
IPA/ˈmaɪ.oʊsɪn/
Letters6
Frequency rank#61,656
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Where “myosin” sits in English frequency

Every-word frequency runs from the handful of words we use constantly (left) to the long tail used once in a blue moon (right). myosin lands here:

#1#100#1K#10K#100K
← used constantlyrarely used →

Scale is logarithmic (each tick is 10× rarer). Source: FrequencyWords open word-frequency list.

Spelling & Dictionary Insight

The English entry for myosin is 6 letters long, classified as a noun, and transcribed in the International Phonetic Alphabet as /ˈmaɪ.oʊsɪn/. Corpus data places it at rank #61,656 in overall English word frequency, marking it as uncommon enough that many writers pause before typing it. Wiktionary records 2 distinct senses for this headword, so context determines which meaning a reader should apply.

myosin doesn't appear in our generated misspelling index, which points to an orthography that plays by predictable English rules. No confusable counterpart is on file for this word, which typically means the spelling is too distinctive to be mistaken for another word.

Etymologically, the entry records: From myo- (“relating to muscle”), and Ancient Greek μυός (muós), genitive of μῦς (mûs, “muscle”) + -in. The correct English form is myosin, spelled M-Y-O-S-I-N.

Definition

  1. 1
    Any of a large family of motor proteins found in eukaryotic tissues, allowing mobility in muscles.
  2. 2
    An albuminous body present in dead muscle formed in the process of coagulation which takes place in rigor mortis.

Etymology

From myo- (“relating to muscle”), and Ancient Greek μυός (muós), genitive of μῦς (mûs, “muscle”) + -in.

Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA); frequency ordering uses the FrequencyWords open word-frequency list (2018 English corpus, MIT). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "myosin"?
"myosin" is spelled M-Y-O-S-I-N. The IPA pronunciation is /ˈmaɪ.oʊsɪn/.
What does "myosin" mean?
As a noun, "myosin" means: Any of a large family of motor proteins found in eukaryotic tissues, allowing mobility in muscles.
How do you pronounce "myosin"?
The IPA (International Phonetic Alphabet) transcription for "myosin" is /ˈmaɪ.oʊsɪn/. Click the speaker icon on the pronunciation badge above to hear it spoken aloud where audio is available.
What is the origin of the word "myosin"?
From myo- (“relating to muscle”), and Ancient Greek μυός (muós), genitive of μῦς (mûs, “muscle”) + -in. See the full etymology section above for more details.
Is PlainSpell free to use?
Yes, PlainSpell is a completely free word reference. You can look up definitions, pronunciations, confusable pairs, homophones, and spelling corrections across 5 languages without any sign-up or subscription.

Using “myosin”

The practical upshot for anyone who landed here from a spell-check.

  • The one correct English spelling is M-Y-O-S-I-N - every other letter order is a misspelling in standard orthography.
  • Say it as /ˈmaɪ.oʊsɪn/ (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
  • Browse more English words and confusable pairs in the same reference. English words
Data Source

Wiktionary (via kaikki.org), licensed under CC BY-SA & GFDL. Word ordering uses an open word-frequency list; misspelling variants are generated by edit-distance from the correct headword.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list FrequencyWords open word-frequency list